server.ts

// These are important and needed before anything else
import 'zone.js/dist/zone-node';
import 'reflect-metadata';

import { renderModuleFactory } from '@angular/platform-server';
import { enableProdMode } from '@angular/core';

import * as express from 'express';
import { join } from 'path';
import { readFileSync } from 'fs';
const api = require('./server/routes/api');

const cors = require('cors');
const bodyParser = require('body-parser');

// Faster server renders w/ Prod mode (dev mode never needed)
enableProdMode();

// Express server
const app = express();

const PORT = process.env.PORT || 3015;
const DIST_FOLDER = join(process.cwd(), 'dist');

if (process.env.NODE_ENV !== 'dev') {
  // Our index.html we'll use as our template
  const template = readFileSync(join(DIST_FOLDER, 'browser', 'index.html')).toString();

  // * NOTE :: leave this as require() since this file is built Dynamically from webpack
  const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main.js');

  const { provideModuleMap } = require('@nguniversal/module-map-ngfactory-loader');

  app.engine('html', (_, options: any, callback: any) => {
    renderModuleFactory(AppServerModuleNgFactory, {
      // Our index.html
      document: template,
      url: options.req.url,
      // DI so that we can get lazy-loading to work differently (since we need it to just instantly render it)
      extraProviders: [
        provideModuleMap(LAZY_MODULE_MAP)
      ]
    }).then(html => {
      callback(null, html);
    });
  });
}

app.use(cors());
app.use(bodyParser.json());
app.use('/api', api);

// Server static files from /browser
app.get('*.*', express.static(join(DIST_FOLDER, 'browser')));

// All regular routes use the Universal engine
app.get('*', (req, res) => {
  res.render(join(DIST_FOLDER, 'browser', 'index.html'), { req });
});

// Start up the Node server
app.listen(PORT, () => {
  console.log(`Node server listening on http://localhost:${PORT}`);
});